Furnace.



PATBNTBD MAR. 3, 1903..

PURNAGE.

` C. B. MILLER & 0. D. COTTON.

. APPLICATION FILED JUNE 5. 1902.

'I0 MODEL.

Mmmm f.. 44

g 2 g l WITNESSES.-

UNITED STATES PATENT OFFICE.

CHARLES B. MILLER, OE CHICAGO, ILLINOIS, AND ORVILLE D. COTTON, yOFDETROIT, MICHIGAN; SAID MILLER ASSIGNOR TO SAID COTTON.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 721,818, dated MarchlB,1903.

Application led .Tune 5, 1902. Serial No. 110.280. (Normoclel.) u

To @ZZ whom it may concern:

Be it known that we, CHARLES B. MILLER, residing at Chicago, in thecounty of Cook and State of Illinois,and ORvILLE D. COTTON,

residing at Detroit, in the county of Wayne and State of Michigan,citizens of the United States, have invented certain new and usefulImprovements in Furnaces, of which the following is a full, clear, andexact specification.

1o Our invention relates more particularly to that class of furnaces inwhich a rotary or oscillatory clinker-bar is employed for working theclinkers from the grate, the same being usually located at the lowerends of converging gratcs between two frame members toward whichl theclinkers and other refuse slide; and our invention has for one of itsimportant objects to provide means for preventing the clinkers fromgorging the paszo sages between these frame members and the clinker-bar.

Another object of our invention is to so arrange one or more perforatedsteam-pipes for supplying steam to the clinkers as to shield z5 andprotect the same from injury.

With these ends in view our invention consists in certain features ofnovelty in the construction, combination, and arrangement of parts bywhich the said objects and certain other objects hereinafter appearingare attained, all as fully described with reference to the accompanyingdrawings andmore particularly pointed out in the claims.

In the said drawings, Eigurel is a plan View ofthe clinker-bar and theframe members with connected parts between which the bar is situated,the grate-bars being omitted. Fig. 2 is a Vertical section on the line 22, Fig. 3; and Fig. 3 is a transverse section on the line 3 3, Fig. 1,also showing the grates in dotted lines and additional steam-pipesthereunder.

lis the @linker-bar, having teeth or wings 2, and 3 4 are the framemembers of the grate, between which the clinker-bar is usually situatedand downwardly toward which the grates slope or' converge, as shown bythe dotted lines 5 G in Fig. 3, the clinker-bar l being journaled in anysuitable bearings (not neces- 5o sary to illustrate) and, if desired,supported at intervals by cross-bars 7. In furnaces of this character itisunderstood that the clinkers and other refuse, but particularly theclinkers, slide down the grates 5 6 to the space between the framemembers 3 4 and are forced 55 through the frame members into the ash-pitbelow bythe continued or occasional rotation of the clinker-bar; butowing to the converging character of the grates the clinkersfrequentlygorgethepassagebetweentheclinker- 6o bar and that one of theframe members 3 4 vtoward which the bar rotates, this being also due inmany instances to the clinkers being larger than Ithe space between thebar and the frame member through which they have to pass. In order toavoid this objectionable result, we provide a crusher-bar, preferably,on the face of each of the frame members 3 4. These crusher-bars areshown at 8 9 as sectional bars recessed in the faces of the frame 7omembers 3 4and secured in place bya suitable number of bolts 10, passingthrough the frame members,and in order that the upward motion of thewings or teeth of the clinker-bar may not tend to dislodge thecrusher-bars the latter are provided with dovetailed or V-shapedprojections 11, rested in complementary recesses in the frame members 34, so as to be held at the lower edges, while the bolts hold them at theupper edges. The Crusher-bars are pref- 8o erably toothed, as shown at12, and these teeth12 project into close proximity to the sweep of theteeth 20u the clinker-bar, so as to coperate with the latter teeth incrushing the clinkers, which lirst lodge upon the Crusher-bars and theirteeth and are thereafter disintegrated by the action of the teeth 2.These crusher-bars 8 9 also form protectingledges for shielding one ormore steam-pipes 13, which are provided with perforations 14, 9o thatsupply steam to the clinkers above the clinker-bar, and thereby renderthe clinkers brittle and capable of being crushed by the' @linker-bar,as will, be understood. These steam-pipes 13 are arranged contiguous to95 the frame members 3 4 and close up under the teeth 12, so that thesteam -from the perforations 14 may pass upwardly between the teeth,While the latter at the same time shield the -pipes from injury. In Fig.3 we have Ico shown additional perforated steam-pipes 16, arranged underthe grates 5 6 for a similar purpose.

Having thus described our invention, what We claim as new therein, anddesire to secure by Letters Patent, is

1. In a furnace the combination of arotary clinker-bar, frame membersbetween which said clinker bar is journaled, perforated steam-pipesarranged lengthwise and at both sides of said clinker-bar and removableledges situated on said frame members above and protecting saidsteam-pipes, said ledges being arranged to coact with said clinker-barincrushing the clinkers, substantially as set forth.

2. In a furnacethecombination ofarotary clinker-bar, frame membersbetween which said bar is journaled having dovetailed recesses in theiropposed faces, Crusher-bars having dovetailed portions fitting in saidrecesses, bolts removably securing said crusherbars to said framemembers adjacent to the sides of said clinker-bar and one or moreperforated steam-pipes arranged under and protected by saidCrusher-bars, substantially as set forth.

3. In a furnace the combination of a rotary @linker-bar, frame membersbetween which said bar is journaled, Crusher-bars projecting laterallyfrom the opposed faces of said frame members and having their edgessituated adjacent to the sides of said clinker-bar and perforatedsteam-pipes arranged under and shielded by said Crusher-bars With theirperforations directed toward said clinlcer-bar, substantially as setforth.

CHARLES B. MILLER. ORVILLE D. COTTON. Witnesses:

F. A. HOPKINS, M. B. ALLsTADT.

